Patent GB-204740-A (GB)
Title: Improvements in or relating to soft hat paring and rounding machines
IPC: A42C1/06
Filed: 1922-06-06
Abstract: 204,740. Turner, A., (Turner Machine Co.). June 6, 1922. Trimming, paring, rounding, and the like.- The hat is secured on a slowly rotated holder, jaws engage opposite sides of the edge of the brim and a knife bridging the gap between the jaws trims the brim during the rotation. The trimming mechanism is mounted on a carriage reciprocated by an adjustable eccentric to give the desired ova form to the brim; this carriage is adjustable en a second carriage to vary the desired width of the brim, and this second carriage is automatically positioned at the commencement of each cycle to maintain the adjustment for width independent of the size of hat. An automatic stop mechanism is provided, allowing a slight over-travel of the holder at the end of each cycle, thereafter bringing the parts to starting position. The hat to be trimmed is placed on a table 37, Fig. 3, and a band 40 is expanded by plungers 38 operated by a cam disc 41 provided with spiral grooves and actuated by a hand-wheel. One of the plungers 38 communicates its movement to a plunger 60 formed with a slot, which in the starting position of the machine engages a head on a member 57 secured to a carriage 49 on which is mounted the trimming mechanism, and thus positions this mechanism in accordance with the size of the hat. When the hat holder commences to rotate, and therefore the members 60, 57 are disengaged, the carriage 49 is automatically clamped in this adjusted position. The trimming mechanism is carried on a carriage 48 which can be adjusted on the carriage 49 towards or from the holder to determine the width of the brim. This mechanism comprises jaws 46, 47 on arms 81, 82 mounted on a pivoted arm 80. A trimming knife is normally housed in one of the jaws, which jaw also carries a guiding or smoothing device 94. These members are all connected by links to an operating handle 97, the links being so arranged that on movement of the handle about its pivot towards the hat the jaws are first positioned on opposite sides of the brim, the jaws are then closed on the brim and the knife projected to bridge the gap between them and the device 94 simultaneously brought into contact with the crown and brim of the hat. Further movement of the handle depresses a link 128 and engages a clutch to start the machine. The machine is driven by an electric motor driving a worm 28, Fig. 9, through a clutch 117, 118, the worm-wheel 29 being connected to the hat holder by bevel gearing. The clutch-actuating fork 123 is operated by a link 131, Fig. 10, between the link 128 and a counterweighted cam-ended arm 132. On the starting of the machine a latch 135 drops to retain the clutch in engagement, which latch is raised at the end of the cycle by a pin 136 rotating with the worm-wheel 29. When the latch is raised a pin 138, Fig. 9, on the clutch fork enters one of a number of holes in a disc 140 connected to the worn 28 by a spring 141. The spring allows slight over-travel of the holder and then returns it to starting position. During the rotation of the holder an adjustable eccentric rotated at twice the speed of the holder moves the trimming mechanism towards and from the holder to give the desired oval form to the brim.